Gas-producer.



P. G. SCHMIDT.

GAS PRODUGER.

APPLICATION FILED MAR. '1, 190a.

Patented Jan. 19, 1909.

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UNITED STATES PATENT QFFICE.

PETER. G. SCHMIDT, OF TUMWATER, WASHINGTON.

GAS-PRODUCER.

Application filed March 7, 1908.

To all whom it may concern:

Be it known that I, PETER G. SCHMIDT, a citizen of the United States,and a resident of Tumwater, in the county of Thurston and State ofWashington, have invented certain new and useful Improvements inProducers, of which the following is a specification.

My invention is an improvement in gas producers and consists in certainnovel constructions and combinations of parts to be hereinafterdescribed and claimed.

The object of my invention is to provide an apparatus to be used in gasproducers, to remove the products of distillation from the parts of theproducer not in the direct line of draft and outside of the zone ofdecomposition, and to conduct said products into and through such zone.

Referring to the drawings forming a part hereof Figure 1 is a sectionalview of a producer provided with the improvement, and Fig. 2 is asection of the upper part of another form of producer with which theimprovement is adapted to be used.

In the present embodiment of my invention, the producer 1 is providedwith the movable grate 2 and the fixed shield 3, through which pass theproducts of decomposition into the collector ipe 4, and to thetransverse pipe 5. The siield is provided with openings 13 registeringwith openings 14 in the wall of the producer, and closed by doors 15.The object of the openings 13 and 14 is to permit inspection of thecombustion zone, and to permit the removal of clinkers through saidopenings.

The producer is provided with the cover 6, having an annular flange 7depending into the water seal 8, and the cover is provided with aflanged feed opening 9, closed by a I cover 10, having a dependingflange 11 engaging the water seal '12.

In the operation of the producer just d e T scribed, the products ofdecomposition pass upwardly through the shield, or downwardly throughthe grate as the case may be, depending upon the direction of the draft.In either case that portion of the material upon the grate and justabove the zone of decomposition, is subjected to more orless. heat, and,as a consequence more or less volatile products are distilled therefrom,which prod ucts pass to the upper part of the producer.

A pipe 16 extends through the side wall of Specification of LettersPatent.

Patented Jan. 19, 1909.

Serial No. 419,680.

the casing, the said pipe being provided with an upwardly extendinglateral extension 17, opening near the top of the casing. The outer endof the said pipe communicates with a vertical pipe 18, which at itslower end communicates with a horizontal pipe 19, extending into thecasing and communicating with the space beneath the grate as at 20. Thepipe 16 extends beyond the pipe 18, and is provided with a packing nut21, through which extends a rod 22, provided at its outer end with ahandle 23, and at its inner end with a piston 24. The upper end of thepipe 18 and the outer end of the pipe 19, are provided with similarpacking nuts 21, and with pistons 24 operated by rods 22. The pistons 24are for the purpose of freeing the ipes 16, 18 and 19 from the condensedpro ucts. The operation of the pistons will be evident from thedescription, and it is not thought necessary to further describe thesame. A valve 25 is provided in the pipe 18, and a bypass connects theportions of the pipe on each side of the valve, the by-pass comprising abody portion 26 in which is interposed an exhauster 27, and arms 28 and29 provided with valves 30, 31 respectively. A pipe 32 leads from thearm 29 extending transversely of the casing as at 33, and upwardly as atthe usual manner, and when operating on the updraft principle, air isadmitted beneath the grate, and the products of the composition passupward through the shield into the pipe 4, and are removed by the pipe 5or the pipe 5 as the case may be. Outside of the composition zone, gasesare distilled from the fuel by the heat and pass upward into the upperpart of the generator. These products are received in the pipe 17 andpass thence through the pipes 16, 18 and 19, to a point beneath thegrate, and are carried upward by the incoming air and steam when used,through the decomposition zone and into the shield, and are removed withthe decomposition products through the pipe 5. Yldien operating on thedowndraft principle, the air and steam are admitted through the pipe 5and the pipe 4 and the shield, to the flue, and the products ofdecomposition are carried away through the pipe 2 shown at the bottom ofFig. 1. When operating on the updraft principle, the valve 36 is closedas is also the valve 25, the valves 30 and 31 being open. Thedistillation products coming through the pipe 17, are thus constrainedto travel through the by-pass and are discharged at 20 beneath thegrate, passing from thence upward through the decomposition zone to theshield. When operating on the downdraft principle, the draft for theproducer is supplied through the pipe 5 as before stated, the valves 25and 31 are closed, the valves 30 and 36 being open. The distillationproducts are thus constrained to follow the byp,ass, and the pipes 32,33 and 34 to the pipe 5, passing into the producer through the shieldand downwardly through the zone of decomposition.

A thermostat 37 of any suitable construc tion is arranged within theproducer outside of the zone of decomposition at any suitable point, thethermostat communicating with a casing 38, provided with a diaphragm 39having rigid therewith a link 40. The outer end of the link is slottedas at 41, and is en gaged by a pin 42 on a lever 43, pivoted by one endto a bracket 44 on the casing and guided in its rising and fallingmovement by a bracket 46 engaging the free end thereof. A sleeve 47 isslidable on the lever 43, the sleeve being retained in its adjustedposition by a set screw 48, and the outer member 49 of a telescopinglink is pivoted to the sleeve, the inner member 50 being pivoted to thestem 51 of a valve 52 working in a casing 53, which is provided with aninlet 54, an outlet 55 and an exhaust 56, the inlet being connected witha suitable supply of fluid under pressure. The outlet communicates by apipe 57, with one end of a cylinder 58, in which is apiston 59, havingits piston rod 60 provided at its outer end with a belt shifter,engaging a belt 62 connecting a suitable source of power not shown, witha cone pulley 63 which operates the exhauster. The piston is normallyretained in its rearward position by a spring 64 arranged between theend of the cylinder and a collar 65 on the piston.

It will be evident from the description, that when the temperature ofthe point at which the thermostat is placed reaches a predeterminedpoint, the lever 43 will be elevated which will operate the valve 52 toplace the inlet 54 in connection with the passage 55, thus admittingfluid under pressure to the. end of the cylinder 58, and forcing thepiston 59 outwardly, which will shift the belt 62, to reduce the speedof the eXhauster 27. A reduction in the speed of the exhauster willdecrease the draft through the material outside of the zone ofdecomposition thus reducing the temperature of the material.

Should the temperature fall below the predetermined point, the outlet 56will be placed in communication with the eXhauster and the spring 64will move the piston rearwardly to reverse the shifting movement of thebelt thus increasing the speed of the eX- hauster.

A valve 66 is arranged within the arm 28 of the by-pass, the valve beingprovided with a stem 67 pivotally connected with the outer member 68 ofa telescoping link the inner member 69 of the link being pivoted to asleeve 70 adjustable on the lever 43 and retained in adjustable positionby a set-screw 71. The members of the telescoping links 49, 51 and 68,69, are retained in adjusted position by set screws 72.

It will be evident from the description that the thermostat will operatethe valve 66 to out off the draft from the by-pass in addition tooperating the exhaust controller, and the parts may be arranged tooperate either the exhauster control or the valve 66, or both the valveand the eXhauster may be cut out of the circulation by closing thevalves 30, 31. The casing 53 is slidable on a rod 73, connected with thecasing 38, a set screw 74 being provided for retaining the casing 53 inits adjusted position.

The exhauster 27 is arranged in the byass for convenience in cleaningpipe 18, and -tor cleaning the, exhauster and the valve 25 is Iprovidedfor the same purpose, the said va ve being closed except during suchcleanin l n the form of producer shown in Fig. 2, the producer 75 isprovided with a cover 76 having a dependent flan e 77 engaging a waterseal 78 and the cover is rovided with a central opening through w iichpasses a feed tube 79, the feed tube being provided with a cover 80provided with a depending flan e 81, engaging the water seal 82. A hood83 is arranged within the feed tube, the said hood being sup orted by anarm 84, extending from the si e of the tube, and a pipe 16 leadsfrom thehood to a vertical pipe 18*, which corresponds to the pipe 18in the formof producer shown in Fig. 1. The products of decomposition when workingthe decomposing zone between the feed-tube and grate on the up draftprinciple are removed through the pipe 5*. The ipe 34 leading from thepipe 5 corresponcs to the pipe 34 in the form shown in Fig. 1.. Thethermostat 37 a is arranged within the feed tube, and the mechanismwhich the thermostat controls is in all res ects the same as themechanism shown in ig. 1. The lower end of the feed tube 79 is providedwith a hollow annular extension 86, having a flange 87 bolted or rivetedto the feed tube as at 88, and the cavity 89 of the extension isconnected by pipes90 and 9 1 with some suitable source of cooling fluid,whereby to prevent over heating of the extension. Above the extension itis lined with refractory material.

When the producer Fig. 2 is operated on the down draft principle theoperation of removing the voiatiles from the distillation chamber formedwithin the feed tube 7 9 is the same as above described when working theproducer on the down draft principle, the distilled votatiles beinghowever, in the latter case passed into the s ace at top of producerthrough pipe 5 81K down through the decomposing zone entering at thesurface of said zone lying between the feed tube 79 and and the wall 75of the producer.

I claim 1. A producer comprising a casing, a grate in the casing, ashield above the grate, a pipe leading from the upper part of the casingto the space beneath the grate, said pipe being provided with a by pass,an exhauster in the by pass, a cone pulley in connection with theeXhauster, a normally closed valve in the pipe between the ends of theby pass, a pipe leading from the by pass beyond the exhauster anddelivering to the shield, a valve for closing said pipe, a valve beyondthe by pass for closing the first pipe, a thermostat in the casing inthe distillation zone, a cylinder adj acent the producer, a piston inthe cylinder, a belt for driving the pulley, a shifter for the beltconnected with the piston, means operated by the thermostat for movingthe piston in one direction, and a spring for moving it in the reversedirection.

2. A producer comprising a casing, a grate in the casing, a shield abovethe grate, a collector pipe leading from the shield, a pipe leading fromthe upper part of the casing, an exhauster in connection with the pipe,means for placing said pipe in communication with the space beneath thegrate and with the collector pipe, a thermostat in the casing outside ofthe decomposing zone line of draft,

and means whereby the thermostat will control the speed of theeXhauster.

3. A producer comprising a casing, a grate in the casing, a shield abovethe grate, col- 4. In a producer, a pipe in communication with thedistillation zone and in communication with the decomposing zone, meansfor rapidly cleaning said pipes, an exhauster in connection with thepipes, a thermostat in the producer, and means whereby the ther mostatwill control the valve in said pipes and the speed of the exhauster.

5. In a producer, means for withdrawing the products of distillationfrom the material outside of the zone of decomposition, and for passingsaid products through the zone of decomposition, and means controlled bythe temperature of said material for controlling said means.

6. In a producer comprising a casing a grate in the casing, a feed tubeabove the grate a pipe leading from a shield within the feed tube andcommunicating with the decomposing zone at such a point that thedistillation products removed through the shield in the feed tube mustpass through the decomposing zone in order to reach the gas outlet ofthe producer, an exhauster in connection with the above pipes, athermostat in the apparatus positioned so as to control the temperatureof the distilling fuel in the tube, at a predetermined point byregulation of the draft through the distillation zone.

PETER G. SCHMIDT.

Witnesses:

B. NORUM, A. H. DAVIS.

